Inventors:
Michael Grant - Chicago IL, US
Ovidiu Marin - Lisle IL, US
Erwin Penfornis - Oak Park IL, US
William A. Von Drasek - Oak Forest IL, US
Assignee:
American Air Liquide, Inc. - Fremont CA
International Classification:
G01J 5/02
US Classification:
25033913, 25033906, 25033901, 2503381, 2503361
Abstract:
A method and apparatus for monitoring the flue gases of a furnace combustion process is disclosed. A by-pass circuit that communicates a sample of flue gases to be monitored from a furnace, through a measurement chamber and back to the furnace or furnace exhaust duct is provided. The by-pass circuit has a gas sampling probe with a fume inlet opening, the probe being positioned for withdrawing the sample to be monitored and transmitting it through the by-pass circuit. A measurement device is positioned in the measurement chamber and comprises an in situ optical device which provides real-time measurement of targeted flue gas species concentrations.